The escalating war of words between President Donald Trump and tech mogul Elon Musk marked the most contentious chapter in a yearslong and at-times rocky relationship between two of the most influential figures in business and politics.

After long months when President Donald Trump and billionaire Elon Musk appeared united in their chaotic mission to remake Washington, their relationship imploded this week.

Once a key member of President Donald Trump's inner circle, a major campaign donor and a scene-stealing presence at Cabinet meetings, Elon Musk's relationship with the president has deteriorated into a bitter public feud since leaving the White House last week.